There is no file explorer on my applications list. There is device storage, there is documents to go, there is gallery, library, but the only thing starting with F is Frozen Bubble. Is this a pre-installed app I can pull in?

Without a network-to-usb cable, the latest update has to be loaded on wifi. As my wifi key is in a text file that I cannot read, I cannot update.
This is not an absolute blocker but it certainly would be if I were trying to do this on the road away from my PC.